Battery Activation:For every installed battery, the i2 will activate the battery by charging it for six seconds at a low current. If zero voltage is detected, all three yellow power indicators will blink quickly. If activation fails the first time, please remove and reinstall the battery once again and activate for the second time.

The Nitecore D2 is a universal smart charger compatible with almost all cylindrical rechargeable batteries, thus eliminating the need to own several chargers.
Features1. Integrated LCD panel clearly...

The Nitecore D2 is a universal smart charger compatible with almost all cylindrical rechargeable batteries, thus eliminating the need to own several chargers.
Features1. Integrated LCD panel clearly...